I like creating original quirks, so I'm just going to post them here for others to use if they wish.
Others can join in and go wild; just remember that if someone says they don't want their quirk used, it is only fair to honor their wishes.
WEAKNESSES are the bad points already built into the quirk
DOWNSIDES are the side effects and further exploitable points outside the quirk
STRENGTHS are what is good about the quirk and what it could be good for
DESCRIPTIONS are a clear and consise (as it can be) description of abilities
OVERUSE SYMPTOMS AND SIDE EFFECTS are strictly what happens when the quirk is overused